Muscoy, California
41 topographic sheets cover this place, the earliest surveyed in 1896 and the latest in 1996. It stands in the San Bernardino census division. It lies in ZIP code area 92407. It stands on Cajon Wash. The Survey maps it on the San Bernardino North quadrangle. 10,719 people lived here at the 2020 count. It stands 1,388 feet above sea level.
Then and now
1896 to 1996The same ground, surveyed 100 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.


Compare 1896 against another survey:
Population over time
2 figuresMuscoy grew from 10,644 to 10,719 between 2010 and 2020. These are the recorded population figures Wikidata holds for this place, reached through the Geographic Names Information System number this page is keyed on rather than by name, so they belong to this place and not to another of the same name. Most are census counts, but not all are: an early figure may be a founding or settlement estimate, and an estimate published within five years of a census is left out. The change column is computed, and is left blank where more than 20 years separate a figure from the one before it, because a gap that long is not a change between two counts.
| Year | People | Change |
|---|---|---|
| 2010 | 10,644 | |
| 2020 | 10,719 | +75 (+1%) |
Topographic sheets covering this place
20 surveys from 41 printed sheetsMatched by testing this settlement's coordinate against the published boundary of every sheet in the United States Geological Survey's historical collection. Each opens the scanned sheet at the Survey.
- 1896 USGS San Bernardino quadrangle1:62500
- 1898 USGS San Bernardino quadrangle1:62500
- 1901 USGS San Bernardino quadrangle1:62500, 8 printings
- 1901 USGS Southern California Sheet No. 1 quadrangle1:250000, 6 printings
- 1904 USGS Southern California Sheet No. 1 quadrangle1:250000, 2 printings
- 1936 USGS Arrowhead quadrangle1:31680
- 1941 USGS Arrowhead quadrangle1:31680, 2 printings
- 1942 USGS San Bernardino quadrangle1:62500
- 1953 USGS San Bernardino quadrangle1:250000, 2 printings
- 1954 USGS San Bernardino quadrangle1:62500, 2 printings
- 1954 USGS San Bernardino North quadrangle1:24000, 2 printings
- 1956 USGS San Bernardino quadrangle1:250000
- 1957 USGS San Bernardino quadrangle1:250000
- 1958 USGS San Bernardino quadrangle1:250000
- 1959 USGS San Bernardino quadrangle1:250000
- 1966 USGS San Bernardino quadrangle1:250000
- 1967 USGS San Bernardino North quadrangle1:24000, 5 printings
- 1975 USGS San Bernardino North quadrangle1:24000
- 1982 USGS San Bernardino quadrangle1:100000
- 1996 USGS San Bernardino North quadrangle1:24000
Fires near this place
762 since 1992Regional context, not property-specific evidence. The federal wildfire occurrence database lists 762 fires within 5 miles of Muscoy between 1992 and 2020, burning about 97,977 acres in total. 6 started naturally. 114 were recorded as arson. Distance is straight-line from the map coordinates, so a fire counted here may appear on a neighbouring settlement's page as well.
| Reported cause | Fires |
|---|---|
| Missing data/not specified/undetermined | 436 |
| Arson/incendiarism | 114 |
| Equipment and vehicle use | 113 |
| Misuse of fire by a minor | 31 |
| Smoking | 17 |
| Debris and open burning | 15 |
| Railroad operations and maintenance | 11 |
| Recreation and ceremony | 8 |
| Power generation/transmission/distribution | 7 |
| Natural | 6 |
| Other causes | 2 |
| Fireworks | 2 |
The most recent of them, most recent first, with the day each was reported and the service that recorded it.
| Date | Cause | Size | Reported by | Name on the report |
|---|---|---|---|---|
| 9 September 2019 | Missing data/not specified/undetermined | under an acre | San Bernardino Unit | not named |
| 9 September 2018 | Missing data/not specified/undetermined | under an acre | California Department of Forestry & Fire Protection | not named |
| 9 September 2018 | Missing data/not specified/undetermined | under an acre | California Department of Forestry & Fire Protection | not named |
| 9 September 2003 | Missing data/not specified/undetermined | under an acre | San Bernardino National Forest | DRY GULCH |
| 7 September 2018 | Equipment and vehicle use | under an acre | San Bernardino National Forest | BEN CANYON |
| 6 September 2007 | Missing data/not specified/undetermined | under an acre | California Department of Forestry & Fire Protection | not named |
| 6 September 2006 | Missing data/not specified/undetermined | under an acre | California Department of Forestry & Fire Protection | not named |
| 6 September 1999 | Missing data/not specified/undetermined | under an acre | San Bernardino Unit | WALKER |
Settlements close enough to share some of these fires:
Mines and quarries near this place
10 of 21 shownRegional context, not property-specific evidence. The federal mineral resources record lists 21 workings within 5 miles of Muscoy: 15 past producers, 4 producers, 1 unknown, 1 prospect. 4 still produce. What was taken out: Sand and Gravel, Construction, Limestone, General, Limestone, Dimension, Limestone, General, Stone, Crushed/Broken. Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.
| Where | Site | Commodity | Status | Recorded |
|---|---|---|---|---|
| Bluebird-Pink Lady and Corky Deps. | Tin, Tungsten, Manganese | Prospect | ||
| Devil's Canyon | Stone, Crushed/Broken | Past Producer | ||
| Lytle Creek Pit A | Sand and Gravel, Construction, Limestone, General, Stone, Crushed/Broken | Past Producer | ||
| Devil S Canyon | Limestone, General | Past Producer | Sedimentary | |
| Dolomite Ridge Placer | Limestone, Dimension | Unknown | ||
| San Bernadino Plant | Limestone, General | Producer | ||
| San Bernardino Plant | Limestone, Dimension | Producer | ||
| Fourth Street Pit | Sand and Gravel, Construction | Past Producer | ||
| Fourth Street Pit | Sand and Gravel, Construction | Past Producer | ||
| George Herz | Sand and Gravel, Construction | Past Producer | Sedimentary |
Storms near this place
4 since 2002Regional context, not property-specific evidence. The National Weather Service names Muscoy in 4 storm reports between 2002 and 2025: 2 flood, 1 wildfire, 1 heavy rain. No death or injury is recorded in these reports. Each account below is quoted exactly as the forecast office filed it, from the NOAA Storm Events Database, and each date opens the federal record of that event.
| When | Event | Place named | Harm | What the report says |
|---|---|---|---|---|
| February 2025 | Heavy Rain | Muscoy | - | Trained spotter reported a 24-hour rainfall of 4.05 inches. |
| March 2018 | Flood | Muscoy | - | Multiple reports of roadway flooding were reported, including a road closure at a low water crossing and street flooding near Muscoy. |
| December 2012 | Flood | Muscoy | - | CHP reported flooding along northbound I-215 at the intersection with SR 259. There was 12 inches of water in the number 3 lane as well as dirt from a nearby construction site running into the lanes. Number 3 lane was closed south of the incident at 5th Street. |
| May 2002 | Wildfire | Muscoy | - | no account filed |
Nearest settlements
The eight closest, with where each one stands in the county. Distances are straight-line, computed from the Geographic Names Information System coordinates.
| Map | Place | Distance | Sheets |
|---|---|---|---|
| Serrano Village | 2.1 miles | 41 | |
| Arrowhead Farms | 2.5 miles | 41 | |
| Verdemont | 3.0 miles | 41 | |
| Arrowhead | 3.0 miles | 41 | |
| Devil Canyon | 3.1 miles | 41 | |
| University Heights | 3.1 miles | 41 | |
| Rialto | 3.6 miles | 38 | |
| Valencia | 3.8 miles | 41 |
Elsewhere
Matched on this settlement's Geographic Names Information System number rather than its name, so it cannot be a different place of the same name in another state.
| Wikipedia article on Muscoy | An encyclopaedic summary. Its text is share-alike, so it is linked here rather than copied. |
| Wikidata item Q1901255 | The structured record the population and elevation above come from. Public domain (CC0). |
Provenance
This settlement is recorded in the Geographic Names Information System as feature 1652756. The sheet list is computed by point-in-boundary test against the United States Geological Survey's historical topographic inventory. Both are works of the United States government and carry no copyright under 17 U.S.C. 105.
Wildfire. Short, Karen C. 2022. Spatial wildfire occurrence data for the United States, 1992-2020 [FPA_FOD_20221014]. 6th Edition. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2013-0009.6 Collected with United States Government funding and usable without additional permissions or fees.
Mines and quarries. USGS Mineral Resources Data System (MRDS) https://mrdata.usgs.gov/mrds/ A work of the United States government, no copyright under 17 U.S.C. 105.
Storms. NOAA National Centers for Environmental Information, Storm Events Database https://www.ncei.noaa.gov/stormevents/ A work of the United States government, no copyright under 17 U.S.C. 105. Narratives are quoted verbatim from the National Weather Service report and are not edited or summarised.



















